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In episode 8.5, a man named Ryo Murasame transformed into Kamen Rider ZX to fight with Gubila. ZX throws Cross Shuricane Bomber at Gubila and explodes. He whip the Micro Chains to Gubila and electrocuted him. He finished Gubila by using ZX Kick. Squidward wakes up and ZX asks if he's okay. Squidward and ZX get out of the sewer and saw Golgolem appears. Golgolem throws a fireball at Squidward and ZX, and explodes. Golgolem fights with ZX and defeated him. But, someone frozed Golgolem and it was Cyber Sub-Zero who appears. An invisible Neronga appears to electrocute Cyber Sub-Zero with Electric Bolt. Because of that, Squidward fights with Neronga to avenge Cyber Sub-Zero. Neronga turned visible and unfroze Golgolem. Both Neronga and Golgolem tried to kill Cyber Sub-Zero, but ZX finished them by using ZX Punch. Cyber Sub-Zero thanking ZX for saving his life and fly away. ZX using Helldriver while Squidward riding a sidecar on ZX's motor bike to go to Netherrealm. They made it to Gatanozoa's Castle. They bust into the castle and land here. But, Grangon and Lagoras appeared. ZX fight with Lagoras while Squidward fight with Grangon. Grangon shoots fireball while Lagoras shoot Ice Beam at ZX and Squidward, but they dodged it and got finished each other. But, Zaragas and Banpira appeared. Banpira released a blanket of fog towards Squidward while Zaragas flash his Blinding Flashes to Squidward. Cyber Sub-Zero appeared to froze Zaragas and Banpira. ZX, Squidward, and Cyber Sub-Zero fly away from the castle. Back at the Netherrealm, Cyber Sub-Zero froze the castle with his Freeze Ray and Squidward turned into Captain Magma to blow the castle where Grangon, Lagoras, Zaragas, and Banpira are in here with Magma Spout and explodes. Captain Magma turns back to Squidward. But, Lagoras was survived and evolved himself. Evolved Lagoras spits a fireball at them and explodes. Evolved Lagoras tried to shoot Cyber Sub-Zero with Ice Beam, but it absorped the power and reflects on Evolved Lagoras, and it didn't affect him. ZX wakes up and throws his Cross Shuricane Bomber at Evolved Lagoras and explodes, but it still didn't affect him. ZX tried to finish Evolved Lagoras by using ZX Kick, but it didn't worked on him. Evolved Lagoras combined Ice Beam and Fireball into Fusion Blast towards them, but Squidward tried to defend them from the Fusion Blast and throws it back to Evolved Lagoras. ZX then used his ZX Kick to finish him. Bullton appears and summon EX Zetton. Squidward fights with EX Zetton while ZX and Cyber Sub-Zero fight with Bullton. Bullton used Dimensional Warping Beam Wave to move them off from him. ZX used Micro Chains to destroy the antenna. Meanwhile, Squidward fight with EX Zetton. EX Zetton throws a Trillion Meteor at Squidward, but it didn't affect. Squidward turned into Captain Magma again and shoots Magma Spouts at EX Zetton, but it absorp the power. Captain Magma turned back into Squidward again. EX Zetton shoots the blue ray towards Squidward, but Squidward dodged it. Squidward jumps and finished EX Zetton with Squidward Kick and exploded him. Meanwhile, ZX and Cyber Sub-Zero are still fighting with Bullton. Cyber Sub-Zero froze Bullton with his Freeze Ray and ZX finished Bullton with ZX Kick. After that, Squidward teleport ZX and Cyber Sub-Zero to Bikini Bottom. Cyber Sub-Zero and ZX turned back into Ryo are leaving Bikini Bottom and thanking Squidward for everything.

In episode 9, someone says "Hold on!", which means that the veteran riders are here to fight them. But Storm Troopers appears to kill the riders and Tyrant appears to kill them. They got teleported to white castle. The villains from the past are revived from their death such as Count Dooku, Cyrax, Sektor, Zetton, Zombie Liu Kang, EX Red King, Scorpion, Bemlar, and Cyber Smoke. The veteran riders begin to fight with revived monsters, villains, and the Storm Troopers, then defeated them except the last Storm Trooper, but got burned by Tyrant. The veteran riders finished Tyrant by their All Rider Kick.

In episode 11, his powers are still remained in Squidward S' powers. Later after the final battle, SpongeBob S, Squidward S, and their friends are seperated from their powers. Drive turns back into Shinnosuke and leaves, and as for Takeshi, Over Lord Kouta, Cyber Sub-Zero, and Asuka leaves too. Then the gang proceed to fix the Bikini Bottom. Many days later, everyone had a vacation at Goo Lagoon now. But, Rainbow Tyrant come to the beach and said that he feels good now, which made all of the characters from the series laughing. After the laughing is over, Rainbow Tyrant leaves, thus the end of the old series.